/* flex布局 */
.u-f,.u-f-ac,.u-f-ajc,.u-f-jsb,.u-f-jse,.u-f-dc,.u-f-drr{
	display: flex;
}
.u-f-ac,.u-f-ajc,.u-f-jsb,.u-f-drr{
	align-items: center;
}
.u-f-ajc{
	justify-content: center;
}
.u-f-jsb{
	justify-content: space-between;
}

.u-f-jse{
	justify-content: space-evenly;
}
.u-f-dc{
	flex-direction: column;
}
.u-f-drr{
	flex-direction: row-reverse;
}	
